Floating neutral

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1

Originally Posted By: jwilliams4
This post was automatically imported from our archived forum.


I have looked all over the 2002 NEC for the code about floating neutrals


in a sub-panel and have come up dry. Can't even find the previous

post on the subject, but I know there are some 'cause I read them.

Any body got some numbers for me so I can read the NEC about it?

HHEELLPP!!!!

Thank you.

--
"not just an inspection, but an education"

2

Originally Posted By: rcooke
This post was automatically imported from our archived forum.


jwilliams4 wrote:
I have looked all over the 2002 NEC for the code about floating neutrals

in a sub-panel and have come up dry. Can't even find the previous

post on the subject, but I know there are some 'cause I read them.

Any body got some numbers for me so I can read the NEC about it?

HHEELLPP!!!!

Thank you.


Question Not having a code book and not wanting one.
I wonder what you trying to find about floating Neutrals .
very uncomin and only used in unusual circemstances.
Just wondering if I can give you some help .

NACHI Where We all learn.

--
Roy Cooke Sr.

http://Royshomeinspection.com
3

Originally Posted By: jwilliams4
This post was automatically imported from our archived forum.


Did a pre-list inspection this afternoon and promised the lady


I would give her something to tell the electrician that installed the

panel. He did some other things that were wrong that she noticed

and when she asked him about it he was all "if you know so much--

prove it to me". She asked if I could help her--I have given her

some other ammunition already. This all 'off the cuff' you see.

If anything comes up about it I'll deny that I was ever born.

--
"not just an inspection, but an education"

4

Originally Posted By: brian winkle
This post was automatically imported from our archived forum.


Quote:
I have looked all over the 2002 NEC for the code about floating neutrals

in a sub-panel and have come up dry


That's because the NEC does not specifically address sub panel neutral connections. However look at 250.24(A)(5).

This is a controversial subject with a lot of sparkies, especially the older ones. For many years 3 wire sub panels were installed. Were they ever legal?
5

Originally Posted By: jwilliams4
This post was automatically imported from our archived forum.


Thank you, sir. I shall be eternally in you debt. (and I’m a deadbeat)

–
“not just an inspection, but an education”

6

Originally Posted By: rcooke
This post was automatically imported from our archived forum.


brian winkle wrote:
Quote:
I have looked all over the 2002 NEC for the code about floating neutrals

in a sub-panel and have come up dry


That's because the NEC does not specifically address sub panel neutral connections. However look at 250.24(A)(5).

This is a controversial subject with a lot of sparkies, especially the older ones. For many years 3 wire sub panels were installed. Were they ever legal?

There is a system of floating neutral . Very unusual very uncommon only used where you can not get a ground rod into the ground . 3 wire systems where not allowed in Canada . All sub panels had to carry a ground with them . You can only have one ground in Canada and that is at the primary panel .3 wire system lead to all sorts of Eddie currents.
I learned about floating Neutral in the fifties have never seen one . I that is why I wanted more information on what is being talked about.

--
Roy Cooke Sr.

http://Royshomeinspection.com
7

Originally Posted By: bkelly2
This post was automatically imported from our archived forum.


Try this Jae


http://www.codecheck.com/pg25_26electrical.html#breakerpanels

--
"I used to be disgusted, Now I try to Be amused"-Elvis Costello

8

Originally Posted By: jpope
This post was automatically imported from our archived forum.


NEC 408.20 Grounding of Panelboards


NEC 250.142(B) Load Side Equipment

--
Jeff Pope
JPI Home Inspection Service
"At JPI, we'll help you look better"
(661) 212-0738